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Verified answer
Waktu= 40 menit
= 40/60 jam
= 2/3 jam
Kecepatan
= 30 km ÷ 2/3 jam
= 30 km × 3/2 jam
= 45 km/jam
jarak = 30km
wktu = 40/60 jam = 2/3jam
kec = jarak:waktu
= 30km:2/3jam
=30x3/2jam
=90:2km/jam
=45km/jam